2020 年 60 巻 3 号 p. 597-601
We have studied influence of Mn doping on electrical resistivity, magnetic properties, specific heat and elastic constants of electrical steels. The electrical resistivity of the steel with Mn content of 1.5 mass% (HM steel) is by 13% higher than that of the steel with Mn content of 0.3 mass% (LM steel) at 5 K, and the difference decreases as temperature increases. In addition, magnetocrystalline anisotropy constant K1 of the HM steel is smaller than that of the LM steel by 15% or more in a wide temperature range. Despite of these benefits as electrical steel, the spontaneous magnetization of the HM steel is by 1.9% lower and specific heat is by 0.9% higher than that of the LM steel. Elastic constants of the two steels are almost the same. Moreover, Curie temperature of the HM steel is by 14 K lower than that of the LM steel.
